Improvement in pneumatic signaling apparatus



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A. CHAMBERS. PNEUMATIC SIGNALING APPARATUS.

No.175,4ZZ. Patented. March 28; 1876..

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A. CHAMBERS.

PNEUMATIC SIGNALING. APPARATUS. v NQ.175,4ZZ. Patented March 28.1876.

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- Specification forming part of Letters Patent No. I {5,422, dated March28, 1876; application filed November 18, 1 5.

To all whom it may concern Be it known that I, AUSTIN CHAMBERS, of No.258 Marylcbone Road, in the county of Middlesex, Kingdom of GreatBritain and Ireland, signal engineer, have invented Improvements inPneumatic Signaling Apparams for Railways,ot' which the following is aspecification This invention has for its object improvements inpneumatic signaling apparatus for railways, and has reference, mainly,to improvements upon and further developments of the invention formingthe subject of Letters Patent granted to me the llth day of May; 1875,No. 163,152,..in which the semaphore-arms or signaling objects or bodiesare operated pneumatically, in such wise that when the pressure of theexternal atmosphere prevails in the pipes, tubes, or passagesestablishing communication between the signaling station or place andthe device which moves the semaphore-arm or other signaling object, thelatter is in the position indicative 'of danger.

apparatus designed to meet the requirements of cases in which theconcurrence of two signal-men, stationed at different places, is neededto move the signaling'object into the position indicating that a trainmay pass. In this arrangement the rod of each semaphore-arm or signalingobject works at its lower end in a guide, and is formed with a slot,through which is passed a pin, forming the fulcrum of a lever orscale-beam, having its fulcrum at or near its center. To each end of thesaidlever or scale-beam is jointed a rod, the one rod being attached tothe weighted upper end or moving part of a collapsible vessel orchamber, and the other rod to the weighted upper end or moving part 01 asecond collapsible vessel or chamber. The collapsible vessel or chamberof one station (say station A) communicates by its pipe with acompressor of the same station, and the other vessel or chamber of thesame station communicates by its pipe witha compressor of the nextstation, (say B.) In like manner one collapsible vessel or chamber ofstation B communicates with one compressor of that station, and itssecond collapsible vessel or chamber with a compressor at the nextstation in the direction in which trains are to proceed. By thisarrangement, supposing the actuating-lever at one station to bemovedinto the position for compressing pair, without, however, moving thesemaphore arm until the actuating-lever of the compressor connected withthe second collapsible vessel or chamber has been moved over, so as tocompress the air and expand the second collapsible vessel or chamberconnected to the same scale-beam.

Figure 1 is an elevation, (with the signal-- posts turned and Fig. 2 isa'plan, showing an arrangement of apparatus according to my invention.

In this arrangement the rod a of each semaphorearm works at its lowerend in a guide, at and is formed with a slot, through which is passed alever or scalebeam, m, having its fulcrum at m. To each end of the leverm isjointed a rod, d (1 the rod d being attached to the weighted upperend of a collapsible vessel, 6", and the rod d to the weighted upper endof a second collapsible vessel, 0. The collapsible vessel 6X of stationA communicates by its pipe f with the compressor is of the same station,and the collapsible vessel 0 ofstation A communicates by Its pipe f withthe compressor 70 k of station B. In like manner the collapsible vessele of station B communicates with the compressor k of that station, andits collapsible vessele with a compressor at the next station in thedirection of the arrow. By this arrangement, supposing the lever i atone station to be moved into the position for compressing the air in itspipe f, it will cause the expansion of the collapsible vessel with whichsuch pipe communicates, and, through the scale-beam m, will cause thecorresponding additional depression of the other collapsible vessel, asshown at 6* and a, (station A,) without, however, moving thesemaphore-arm 1) until the lever i of the compressor k 70, connectedwith the second collapsible vessel 0, has been moved over, so as vessel6, as shown atstation Bi It will be evident-that the apparatus may bereadily modified, so that the signals shall be moved into the safetyposition on rarefying to compress the air and expand the collapsible'the air in the apparatus, instead of by compression. l. l. .3

Having described the nature of my said invention, and the manner ofcarrying it into I I g practical efl'ect, Ielai 1 p I i I a pneumaticsignaling apparatus for railways, the combination, with a seinaphore-.

u I arm or ts equwalent ot a slotted rod, a, lever.

orscale-beam m, and two" collapsible vessels,

60 operated from independent stations or places, as above set forth, forthe purpose specified.

. AUSTIN CHAMBERS.

Witnesses:

W. LLOYD WIsE, PatentAgent, London. E KING-COM'BE,

Clerk, 69 King William Street, E. (I.

